Mechanical Engineering Questions And Answers :: Process Instrumentation And Control: part2



Mechanical Engineering : Process Instrumentation And Control QUESTIONS AND ANSWERS :: part2 : 1 to 5

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

1.Which is not correct about load cells used to measure weight/force :

accuracy of the order of 0.01 to 1%
rugged and compact construction
no moving parts and negligible deflection under load
low resistance to side load and low overload withstand
hermetically sealed and thermal compensation.

2.Which type of device is suitable for dynamic force measurement:

lever balance
spring balance
proving ring
piezo-electric transducer
all of the above.

3.When the pressure medium to be measured is air or gas, the pipe is made to rise continuously to the gauge, so that:

no air or vapour can collect in pipe
any moisture can be drained '
moisture does not come in contact with elements of sensor/gauge
moisture can condense to form seal of water
static head error due to moisture is eliminated.

4.Thermal expansion of a solid is employed in :

thermocouple
resistance thermometer
bulb thermometer
bimetal element
zener diode.

5.Pick up false statement about liquid-in-metal thermometers :

remote indication of temperature can't be given
error is produced if capillary passes through hot zone
error also occurs if instrument base is at high ambient temperature
error can also creep in by the head of the liquid if the bulb is installed either above or below the Bourdon
these are used for industrial applica-tions where accuracy is not so impor-tant.

More Process Instrumentation And Control QUESTIONS AND ANSWERS available in next pages

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